A place to discuss BIM (Building Information Modeling,) VDC (Virtual Design and Construction) and all the other acronyms that are sweeping the AEC industries. Yea, though I walk through the valley of BIM...

Pages

Thursday, October 30, 2008

A lot of Revit users know that they can save Drafting views to a New File. This is a super useful way to build your library of Revit typical details.

The other day I found that same option available when you right click a MODEL View. Hmmmmm. What happens if I click that?

Well here's what happens:

You get a new file (oh is that what they mean by Save as New File?) that only includes the view you saved. What is that view useful for? Well drafting views can be imported into a project, but NOT this. So, I really don't know what you could use this for? Maybe use it as a lightweight file you can email to allow a consultant/owner to view a specific condition. But I think I'll stick with a jpeg screen capture or a DWF.

What is included in this new file? It is a file that contains the parts of the model that are within the extents of the view element. The only views that are saved to the Project file are those that are referenced by our saved view. No Plan or Ceiling views, etc, etc. Just the Callout of the Section and the Section. You DO get the 3D view with a scope box defined by the saved view element.

This is where most people would stop.

But... what happens if we stretch that scope box?

Hmmmmmmmm, What's happening here?

Lets look at the Section view that is referenced by the callout.

Notice that the Crop Region extends well past the the section of wall that was captured. However the wall itself stops at the level above and below the callout. What if we turn the scope box off? What else is in this thing?

Wow! The whole site? Really? There has to be a reason though.

There it is. The view extents of the referenced section touch the site.

What can we do to exclude some of this extra geometry from the file?

What if we don't use a "child" view like a callout? Crop down the extents of the Section and ... well you can't select the the option UNLESS there is some kind of 2D detail in the view. In this case I place a random detail component I'm sure you could use a detail line.

Lets see the result.

Nope, that's not it. Let's "Don't Crop" the resulting section.

OK one more try in a post that has grown totally out of control.

Maybe the fact that the wall extends to the level and the level intersects the topography.

Adding a level to the original project didn't fix it. And it didn't matter whether the level was within the extents of the the view to be saved or not.

Even moving the base constraint of the wall to the new level didn't help. Darn toposurface...

Eureka!!! Turn the Toposurface category OFF in the original view!!! Duh! The final product in all of its glory.

So what was the point of all this? Well, I think it's an interesting fact that you can save a model view (oh, but don't forget the 2D details component (yes, a line works)) to a separate file.

Interesting aside, I just can't leave well enough alone. I love to dig down and figure this Revit thing out. Sure I could have just gone through the process on my own and posted the results. Warning you that the view had to contain a 2D component and to turn off the topography (Still not sure why other categories that weren't within the extents of the original view didn't save as well.) But this way you were along for the ride and MAYBE it will inspire you to investigate that idea you have been thinking about in Revit.

This is basically what I do as an Application Specialist. Usually it is a little more focused on a clients specific problem and not always Revit based, but digging into the WHY is what I do... Give it a try, its NIFTY!

Thursday, October 9, 2008

Back in July, I posted a thread about lights hosting to reference planes UPSIDEDOWN here and here. I have wanted to post this fix for awhile. Reference planes have a top and a bottom. Light fixtures (and other objects) host to that "normal" surface. When you draw a plane from right to left, fixtures host correctly. When you draw them from left to right, the "normal" surface is up and the light hosts upside down... I guess in actuality the plane is upside down and the light is normal to it. Why host to a plane in the first place... well read the above links for more, but you could lose all of your work if the ceiling in a linked model is deleted and your hosted to it. However, it seems that has been fixed recently.

Note: One of the issues in those past posts was that the System Family "Basic Ceiling: Generic" behaves like a reference plane. Unfortunately you don't get the chose how the ceiling gets placed in the model.

It seems that JING videos don't scale so I can't embed it. Follow the link.

Wednesday, October 1, 2008

Steve, over at RevitOpEd, posted a Stump-the-Chump question about a user not being able to place a room in the penthouse. Check out his post for the particulars then come back here for my explanation of what's happening...

Back? Good. So here's what I found:

The main roof seemed to be keeping the room from placing. If I raised the base of the Penthouse walls to be even with the top of the roof I could place the room.

If I offset the roof to be below the level I can place the room. If you could access the room’s “base offset” I think that you could raise that to the upper surface of the roof and you would be able to place the room, but I couldn't figure out how to access that parameter till after the room was placed, and if I changed it then, it didn't seem to matter.

So set the “base offset” of one wall (that’s all it took) to equal the roof thickness. This allowed me to place a room in the penthouse and outside the penthouse as well. Hmmmmmmm……

Now for the weirdness; I wanted to play with the rooms a little. I reset the “base offset” of the wall to 0’-0” and the room disappears. I figured that in AR (Actual Reality) you would never place a penthouse over the roof, you would have a floor there.

So I cut a hole in the roof and the room inside the penthouse appeared, but the one outside, did not. IF you look closely you will see that the second room is actually bound by the upper and lower surface of the roof.

I guess, since the room originates on the level... and roof is on the level... the room is “trapped” inside. I know the feeling… Sometimes I feel trapped in Revit. :)

I clearly spent WAAAY to much time on this. But, I can't help it... I LOOOOVVVVEEE Revit problems. It's kind of a stimulant that the logical mind just eats up. BTW, if you make the Main Roof not "bounding" the level acts as the base bounding plane for the room and the Upper Limit is what you set in the room parameters so the room displays correctly. That's what I would suggest as a fix for this particular problem, but that won't work if the room on the floor below is relying on the roof to be a bounding element. Cheers!

Comment Moderation

Comments are moderated to manage spamming. Comments will appear as soon as they have been reviewed.

The views and opinions expressed by ME in this blog are my own and are not the opinions of my employer or any organization with which I am affiliated. Content on this blog shall be considered for informational use only and any readers should independently verify any results. Any reference to software or copyrighted, trademarked or otherwise owned processes and procedures on this site is made acknowledging this ownership. Refer to the owner's website and/or product pages for specific trademark and copyright information. I am not responsible for, and will not be held liable for, comments made by others on this blog.